Sperm cryopreservation is the process of freezing sperm cells at -196 degrees Celsius using liquid nitrogen, preserving them indefinitely by halting all biological activity. Cryoprotectant agents prevent ice crystal damage during cooling, and controlled freezing rates protect cell viability. Properly stored sperm has been shown to remain viable for over 20 years, with published cases reporting pregnancies from samples stored for more than two decades. There is no established absolute limit to storage duration when conditions are consistently maintained. For more visit cryolab.co.uk
